Burner drum



J. S. BRENNAN.

BURNER DRUM.

APPLICATION FILED 050.3. 1919.-

' 1 42312,, Patented-Sept 5,1922.

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amuse sw iazazu ace 9 rarest JOHN s. BRENNAN," or MIL A KEE, wrsoousru.

BURNER DRUM.

Applicationfiled December 3,1919. serial 1%. 342,166.; v

To all whom it may concern Be it known that I, Join: S. BRENNAN,

a citizen of the United; States, and resident of Milwaukee, in the'oounty of Milwaukee and State of Wisconsin, haveinvented ,cer-' oil burners, more particularly of that'type ed by an imperforate casing.

. space and at the top of the tubes.

adapted for use in domestic cooking stoves and comprising a pair of concentric perforated tubes extending upwardly from .an annular wick head, the'tubes being surroundof device, the oil is vaporized and the resultant vapor rises in the annular space be tween the tubes, the process of combustion I v perforated to permit free passage of air being carried on throughout this annular In this type vof structure, there exists a tendency for the inner tube to suffer disintegration due to the action of excessive heat generated in the drum, and the upper end portion of the inner perforated tube is particularly 5 liable to disintegration. I

It is in general the object of my invention to improve the combustion action of burner drums of this character with respect .to the procurement of a complete combustion of the vapor gases and an even distribution of the flame at the top of the burner.

drun'i,\and it is more particularly my object to. prevent excessive heating ofany portions of the perforated tubes, while at the same time maintaining an even and free flow of air through the inner tube so as to insure completion of the combustion action at the top of the burner drum.

With the above and other objects and advantages in view, which will be apparent as the description proceeds, my invention In this typewickisection 6 disposed therein andipr-ojecting slightly above seating ledges formed laterally turning the upper edgelportions 7 of the trough, the'trough .5 being provided with the usual depending supply stem 8".

ThG LISLULl inner and outer perforated combustion tubes 9 and 1.0 respectively have their lower ends seating on the ledges 7, the

tubes being held in concentricfspaced rela.

tion. by :the usual cross-rods 11 passed through their upper port-ions, said rods also 1 supperting'the usual outer'casing member 12- having an inturnediperforated flange 13 at its lower edge and having an inturned frustoconical flange-14; at its upper end' which is (equal in width substantially to the distance between the walls of. the .casing 12 and the outer tube 10. A; partition 15 extends acnoss thetog of the space enclosed by the wick trough 5, this partition being therethrough, but at the same time break bustion gaSes -withinnthe tube space, and a centrally perforated- {plate 16 is disposed" within and secured to'the" lower. portion of the inner perforatedEtubeqd. i.

Pract ce has demonstrated; that i in the aforedescribed conventional.structure, acertain flow of air entirely-throughthe innerf combustlonstube 19,-1snecessary to-ins-ure completionofgthe combustion action at the top of the drum, while an excessive flow of-air therethrough will procure such active v combustion"conditions immediately. adj-a1; cent. the inner tube -9 as .to raise-said tube to a white'heat. and thus set up'those proc-l esses which procure disintegrationof; the

tube, It is thereforeliighly important-to ther bent to embrace the upper edge of the tube and thus sup-port the plate.

edge of the tube 9 is'spaced a slight distance below the upper-edge of the outer The upper tube 10, andga substantially frustoconical section-18 is seated on the plate, with its top extending approximately to the plane of the upper edge of the frustoconical casing flange 1a, the wall of this frustoconical' top with a slightly smaller central aper ture 20.

Entering now into the operation of my improved structure, it is noted that the usual free supply of air is permitted between the casing 12 and the outer combustion tube 11, while a moderate supply of air is admitted through the perforated partition 15 'to the interior of the inner combustion tube 9, and air may enter the annular space between the tubes and commingle for combustion with the oil vapor in said space through the perforations of the tubes throughout their entire lengths. By providing a series of centrally apertured plates within the combustion tube 9, a fairly free flow of air is pro vided through the center of the space enclosed by the tube, while the flow of air immediately adjacent the inner surface of the tube is retarded, to thus discourage active combustion'processes immediately adjacent the surface of the tube which would tend to procure an excessive heating of the inner tube to a white hot condition. same time, the free flow of air through the central portion of the space enclosed by the tube 9, which is permitted by the central apertures of the various plates and frustoconical section 18, will supply a current centrally at the top of the drum which will finish the combustion process in a complete manner, and this current of air will tend to draw combustion gases inwardly from the top of the annular space between the tubes, thus spreading the flame action over the top of the drumby reason of the frustoconical section 18. It will be further noted that the sum of the areas of the apertures of the burner trough partition 15 is greater than the area of the aperture of the plate 16 which in turn is greater than the area of the aperture of the plate 17, this latter area be ing inturn slightly greaterthan the area of the aperture 20 of the frustoconical section At the the diameter of the air column extending I through the space defined by the inner tube 9.

l Vhile I have shown and described a preferred embodiment of my invention, it will be appreciated that various changes and modifications of structure may be employed to nieet'diifering conditions ofuse, without. departing in any manner from the spirit of my invention.

l/ hat is claimed is:

1. In a burner structure of the class described, in combination, a pair of upstanding concentric perforated tubes, 'a plate eX-, tending across the top of the inner tube, said plate being provided with a central aperture and a section of substantially frusto-conical shape having its base portion seated on the peripheral portion of the plate and having a central aperture slightly smaller than the aperture in the plate.

2. In a burner structure of the class described, in combination, a pair of upstanding concentric perforated tubes, a plate extending across the top of the inner tube and provided with a central aperture and being imperforate adjacent the wall of the inner tube, and a substantially frustoconical section disposed above the plate and provided with a central aperture.

3. In a burner structure of the class described, in combination, a pair of upstanding concentric perforated tubes, a plate extending across the top of the inner tube, said plate having its peripheral portion upwardly turned to lit in the top of the tube and then outwardly turned to seat on the tube, said plate being provided with a central aperture, and an apertured section of substantially frustoconical shape having its base portion seated on the peripheral portion of the plate.

In testimony that I claim the foregoing l have hereunto set my handat Milwaukee,

in the county of Milwaukee and State of lVisconsin.

JOHN s. BRENNAN. 

